MMA fighter Jonathan "War Machine" Koppenhaver was arrested at a Southern California hotel Friday a week after an alleged confrontation with his ex-girlfriend, adult film actress Christy Mack.

LAS VEGAS (AP) A jury will decide whether a former mixed martial artist named War Machine tried to kill his porn actress ex-girlfriend and her friend after letting himself in with a key and finding ...

Everyone's favorite lunatic fighter, War Machine, or the fighter formerly known as Jon Koppenhaver, will fight at the MMA Big Show fight in Beltarra, Ind. in June. He will take on Roger Bowling. Joe ...

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